JP2017208317A - Lighting device using led, drive circuit of lighting device using led, and driving method of lighting device using led - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device using an LED which ensures stabilized light emission, while reducing cost and improving reliability because smoothing capacitor is not required, realizes low power consumption, and does not generate electromagnetic noise at all because switching regulator is not used, and to provide a drive circuit of the lighting device using the LED, and a driving method of the lighting device using the LED.SOLUTION: A lighting device using an LED includes multiple LED light-emitting elements, and an LED drive circuit for driving them, where an LED matrix is formed of the multiple LED light-emitting elements, the LED matrix is configured to change an LED connection structure dynamically corresponding to an inputted AC waveform, by a matrix structure change control circuit, and to minimize loss in the control circuit and the element by optimizing the successively changing applied voltage and the request voltage of the element, thereby optimizing operation efficiency of a current control circuit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an illumination device using an LED, a drive circuit for the illumination device using an LED, and a driving method for the illumination device using an LED.

  Lighting devices using light emitting diodes (LED elements, hereinafter also simply referred to as LEDs) have characteristics of longer life and lower power consumption than conventional lighting fixtures such as fluorescent lamps and incandescent bulbs. It is expected to be a next-generation lighting device that excels in consideration. In the case of using an AC power source directly as a drive power source, the AC power source is full-wave rectified and supplied to the LED array.

  When the AC power supply is subjected to both-wave rectification, only a half wave of one polarity (for example, plus side) of the AC alternating waveform is an intermittent pulsation waveform. On the other hand, when full-wave rectification is performed, a continuous pulsating flow waveform is obtained in which one polarity (for example, the positive side) and the other polarity (the negative side) half-wave are folded back. The AC direct drive is a system in which a power supply having such a pulsating waveform is directly applied to an LED to light it.

The LED has a predetermined voltage for lighting (lighting voltage), and the LED is turned off below the lighting voltage. When a full-wave rectified pulsating voltage is applied, the voltage of the pulsating waveform turns on (on) above the lighting voltage, turns off (off) below that voltage, and repeats this. The repetition of the period from the turn-off to the next turn-on (turn-off period) is so-called flicker (flickering of illumination light). In the case of a 50 Hz AC power supply, flicker occurs 100 times per second.

  If this extinction period becomes longer, it is recognized as a psychologically unpleasant phenomenon. Such a change in the operating current of the drive circuit accompanying the blinking of the LED is radiated to the surroundings as an electromagnetic wave accompanied by a harmonic. This electromagnetic wave interferes with various electronic devices including televisions, radios, and medical devices and causes noise.

Note that the generation of high-frequency noise from such an LED drive circuit is extremely remarkable in the DC drive system currently employed by many LED lighting devices. The direct current drive method is a method in which alternating current is once converted into a smooth direct current voltage, and the LED is driven by a predetermined level of direct current. A high-frequency high energy is generated due to a switching operation in an AC / DC converter circuit used to convert an AC power source into a DC, that is, an inverter circuit. Further, such a power supply circuit has a large number of elements, which makes the circuit complicated and expensive. In this case, the rectifier circuit requires a large-capacity capacitor such as an electrolytic capacitor and a voltage transformer (transformer). Such an electrical component has a shorter life than an LED and is not preferable in combination with an LED, which is a long-life lighting means .

  For example, Patent Document 1 discloses a DC drive type LED technology as a disclosure of conventional technology relating to LED driving, and lighting with a DC smoothing voltage while reducing high-frequency components of commercial AC input current. An LED lighting device (LED drive circuit) that can obtain a light output equivalent to that of the above case is disclosed.

More specifically, a first capacitor connected in parallel to the output terminal of a full-wave rectifier for full-wave rectification of commercial AC current, a switching power supply circuit unit whose input terminal is connected in parallel to the first capacitor, and switching An LED light-emitting unit connected to the output terminal of the power supply circuit unit and a second capacitor connected in parallel to the LED light-emitting unit, the capacitance of the first capacitor is less than 1 μF, and the second capacitor emits LED light The capacity is set such that the ripple rate of the current flowing through the section is less than 1.

  On the other hand, Patent Document 2 discloses an LED drive circuit that drives an LED array having a plurality of LEDs connected in series, and a rectifier that rectifies an AC input. A constant current circuit having an operational amplifier and a plurality of driving transistors connected to an output group of the operational amplifier via a voltage dividing resistor, and connecting one end of the output side of the rectifier to the input side of the LED array, An LED drive configured such that a plurality of transistors selectively drive an LED array according to an AC input voltage by connecting one end of the output side of the transistor to a connection point of a different number of LED groups in the LED array. A circuit is disclosed.

JP 2009-134945 A JP 2013-20929 A

However, as a result of considering the promotion of popularization, the LED drive circuit disclosed in Patent Document 2 also employs a circuit configuration that can be directly driven by an AC input. if, with respect to increase or decrease the voltage of up to 100 times per second full-wave rectification, LED driving circuit which is more fine finely currents also can follow improvements are desired. In particular, when driving an LED string in which a large number of LEDs are connected in series, the period during which the LED string is not lit (extinguishment period) due to fluctuations in the AC input voltage becomes longer and flicker becomes noticeable. There is a need for an illuminating device using an LED that can further suppress flicker felt by human eyes, a driving circuit for the illuminating device using the LED, and a driving method for the illuminating device using the LED. Overall, it has a simple structure, can reduce the number of parts, can be manufactured at a low cost, has high reliability, and provides stable light emission that solves the problems of flicker and dark time. Therefore, it can be said that there is a demand for realizing low power consumption and long life.

    The present invention solves these problems, obtains stable light emission with a simple configuration, eliminates the need for a smoothing capacitor, reduces cost and improves reliability, achieves low power consumption, and does not use a switching regulator. Therefore, it is intended to provide an illumination device using an LED that does not generate electromagnetic wave noise at all, a drive circuit for an illumination device using an LED, and a method for driving an illumination device using an LED.

  The present invention is an illumination device using LEDs, comprising a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements. The LED matrix has a configuration in which the LED connection structure is dynamically changed according to the input AC waveform by the matrix structure change control circuit, and the applied voltage and the required voltage of the element that are sequentially changed are optimized, It is a lighting device using an LED characterized by minimizing loss in the control circuit and elements by optimizing the operation efficiency of the current control circuit, and a driving circuit for the lighting device using such an LED. This is a driving method of an illumination device using an LED using the same.

  Further, according to the present invention, the LED matrix is configured by a power of 2 LED light emitting elements, and the matrix structure change control in the LED matrix is configured by a power of 2 less than the total number of LED light emitting elements. The matrix light emitting element is divided into a plurality of matrix light emitting elements and dynamically changed in response to a waveform applied by a matrix structure change control circuit that determines an optimum structure for an element switch circuit that changes the connection form of the matrix light emitting elements. A lighting device using an LED, a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED.

  In addition, the present invention provides a matrix structure change control circuit or software algorithm that dynamically compares a normalized reference voltage with a sequentially changing power AC waveform voltage to thereby change the matrix control structure bit. An illumination device using an LED, wherein the output value is determined to an optimum value, a drive circuit for the illumination device using the LED, and a method for driving the illumination device using the LED using the LED It is.

  According to another aspect of the present invention, there is provided a lighting device using an LED, comprising a constant current control circuit that makes a current applied to each LED light emitting element constant regardless of a change in the LED connection structure. This is a driving circuit for an illuminating device using such an LED, and is a driving method for an illuminating device using an LED using the same.

  The present invention is also a lighting device using LEDs, characterized in that the constant current control circuit is arranged outside the LED matrix as a collective control constant current control circuit, and illumination using such LEDs. It is the drive circuit of an apparatus, It is a drive method of the illuminating device using LED using this.

  According to the present invention, there is provided a lighting device using an LED, wherein the collective control constant current control circuit is a constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor. There is a driving circuit for an illuminating device using such an LED, and a driving method for the illuminating device using an LED using the LED.

  Further, the present invention is an illumination device using an LED, characterized in that the constant current control circuit is arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements, It is a drive circuit of the illuminating device using such LED, and is a driving method of the illuminating device using the LED using this.

  Further, the present invention is characterized in that the constant current control circuit is arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements, and the constant current for each of the matrix light emitting elements. The control element is a constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor, and the constant current control element for each of the matrix light emitting elements is a voltage applied A lighting device using an LED, characterized by performing constant current control dynamically by feedback regardless of whether the LED is a driving circuit of the lighting device using the LED, and an illumination using the LED using the LED It is a drive method of an apparatus.

  The present invention also includes a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements, and the LED matrix has a matrix structure change. The LED connection structure is dynamically changed corresponding to the waveform applied by the control circuit, and the LED that optimizes the voltage applied to each LED element according to the alternating waveform voltage that changes sequentially is used. A power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix, a synchronous waveform filter that generates a synchronization signal for the waveform of the input commercial power supply, and the synchronization An operation state comparison detector for determining an operation state based on a signal from the waveform filter and the connection structure of the LED matrix in an arbitrary and / or optimal state An LED element switch unit and a matrix structure change control circuit are provided, which is an illumination device using an LED, and a drive circuit for the illumination device using such an LED. It is the drive method of the used illuminating device.

  Further, according to the present invention, the synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power source to the LED matrix, acquires a filtering signal from the pulsating current, and determines an operation state. A lighting device using an LED, and a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED It is.

  According to the present invention, the power supply unit that supplies the pulsating current obtained by full-wave rectification or both-wave rectification from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier, and the bridge rectifier is the LED matrix and the synchronous waveform filter. An illuminating device using an LED, characterized by outputting a full-wave rectified or both-wave rectified pulsating current from a commercial power source, and a driving circuit for the illuminating device using such an LED. It is the drive method of the illuminating device using existing LED.

  In the present invention, the power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier, and the bridge rectifier is connected to the LED matrix from the commercial power supply. A first bridge rectifier that outputs a pulsating current rectified by wave rectification or both waves, and a second bridge rectifier that outputs a pulsating current rectified by full wave or both waves from a commercial power supply to the synchronous waveform filter. This is a lighting device using an LED, a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED.

  The present invention also includes a state control current look-up table controlled by a constant current control circuit, and a batch control constant current control circuit based on a voltage comparison that sequentially changes with the look-up table that holds the normalized voltage-current relationship It is the illuminating device using LED characterized by performing stepwise constant electric current control by, It is a drive circuit of the illuminating device using such LED, The driving method of the illuminating device using LED using this It is.

  Further, according to the present invention, an LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements, and the matrix light emitting element is an element switch for sequentially changing an arbitrary structure. The connection structure of the LED matrix is changed to an optimum state by changing the connection state of each element switch unit corresponding to the control signal from the matrix structure change control circuit. It is an illuminating device using LED, it is a drive circuit of the illuminating device using such LED, and is a driving method of the illuminating device using LED using this.

  According to the present invention, the element switch unit includes three or more switches, and the connection structure of the LED matrix is changed by changing the connection state of these switches. An illumination device using an LED, which is a switching circuit including a field effect transistor FET and a bipolar transistor, and a drive circuit for the illumination device using the LED, and an illumination using the LED using the LED It is a drive method of an apparatus.

  The lighting device using the LED according to the present invention, the driving circuit of the lighting device using the LED, and the driving method of the lighting device using the LED can obtain stable light emission that solves the problems of flicker and dark time with a simple configuration. This eliminates the need for a smoothing capacitor after rectification and a large-capacity electrolytic capacitor, can be manufactured at low cost, improves long-term reliability, eliminates high-frequency noise problems, and optimizes the operating efficiency of the current control circuit. Thus, there is an advantage that it is possible to provide a control circuit, an illumination device using an LED that realizes minimization of loss in elements, a drive circuit for the illumination device using the LED, and a drive method for the illumination device using the LED.

FIG. 1 is a conceptual diagram for explaining functions of an illumination device using an LED according to the present invention, a drive circuit for the illumination device using the LED, and a drive method for the illumination device using the LED. FIG. 2 is an explanatory diagram for understanding the switch matrix operation in this embodiment. FIG. 3 is a conceptual diagram showing the AC voltage and state (states 2 to 6) after practical normalization, the switch timing of the LED array matrix, and the waveform synchronization pattern. FIG. 4 is a diagram for explaining an array shape change pattern of the LED array matrix. FIG. 5 is a diagram for explaining an array shape change pattern of the LED array matrix. FIG. 6 is a diagram for explaining that all the LEDs can be turned on when all LEDs exceed the minimum activation voltage VF of the LEDs. FIG. 7 is a conceptual diagram showing a functional block diagram of a drive circuit of a lighting device using LEDs according to the present invention. FIG. 8 is an LED element switch block diagram showing the relationship between the LED element switch unit and the LED elements. FIG. 9 is a conceptual diagram showing the operation of the matrix switch. FIG. 10 is a table showing the relationship between the switch state and the operation state in the matrix switch unit. FIG. 11 is a conceptual diagram illustrating an operation example of the matrix switch. FIG. 12 is a conceptual diagram illustrating an operation example of the matrix switch. FIG. 13 is a conceptual diagram illustrating an operation example of the matrix switch. FIG. 14 is a conceptual diagram showing an example of a mounting form of a drive circuit of an illumination device using an LED according to the present invention. FIG. 15 is a conceptual diagram showing a series-parallel switching circuit of an element switch unit and a wiring on a single-layer board according to the present invention.

  Hereinafter, an illumination device using an LED according to the present invention, a drive circuit for the illumination device using the LED, and a drive method for the illumination device using the LED will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram for explaining functions of an illumination device using an LED according to the present invention, a drive circuit for the illumination device using the LED, and a drive method for the illumination device using the LED. In the present invention, a conventional LED element treated as an alternative to an analog light bulb can be handled like a digital bit string, thereby obtaining a stable light emission that solves the problems of flicker and dark time with a simple configuration, By eliminating the need for a smoothing capacitor after rectification and a large-capacitance electrolytic capacitor, it can be manufactured at low cost, and long-term reliability is improved. A control circuit, an illuminating device using an LED that realizes minimization of loss in the element, an illuminating device driving circuit using the LED, and an illuminating device driving method using the LED are realized.

  The present invention is an illumination device using LEDs, comprising a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements. The LED matrix has a configuration in which the LED connection structure is dynamically changed according to the input AC waveform by the matrix structure change control circuit, and the applied voltage and the required voltage of the element that are sequentially changed are optimized, It is a lighting device using an LED characterized by minimizing loss in the control circuit and elements by optimizing the operation efficiency of the current control circuit, and a driving circuit for the lighting device using such an LED. This is a driving method of an illumination device using an LED using the same.

  Further, according to the present invention, the LED matrix is configured by a power of 2 LED light emitting elements, and the matrix structure change control in the LED matrix is configured by a power of 2 less than the total number of LED light emitting elements. The matrix light emitting element is divided into a plurality of matrix light emitting elements and dynamically changed in response to a waveform applied by a matrix structure change control circuit that determines an optimum structure for an element switch circuit that changes the connection form of the matrix light emitting elements. A lighting device using an LED, a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED.

  In addition, the present invention provides a matrix structure change control circuit or software algorithm that dynamically compares a normalized reference voltage with a sequentially changing power AC waveform voltage to thereby change the matrix control structure bit. An illumination device using an LED, wherein the output value is determined to an optimum value, a drive circuit for the illumination device using the LED, and a method for driving the illumination device using the LED using the LED It is.

  According to another aspect of the present invention, there is provided a lighting device using an LED, comprising a constant current control circuit that makes a current applied to each LED light emitting element constant regardless of a change in the LED connection structure. This is a driving circuit for an illuminating device using such an LED, and is a driving method for an illuminating device using an LED using the same.

  According to another aspect of the present invention, there is provided a lighting device using an LED, comprising a constant current control circuit that makes a current applied to each LED light emitting element constant regardless of a change in the LED connection structure. There is a driving circuit for an illuminating device using such an LED, and a driving method for the illuminating device using an LED using the LED.

  According to the present invention, there is provided a lighting device using an LED, wherein the collective control constant current control circuit is a constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor. There is a driving circuit for an illuminating device using such an LED, and a driving method for the illuminating device using an LED using the LED.

  Further, the present invention is an illumination device using an LED, characterized in that the constant current control circuit is arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements, It is a drive circuit of the illuminating device using such LED, and is a driving method of the illuminating device using the LED using this.

  Further, the present invention is characterized in that the constant current control circuit is arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements, and the constant current for each of the matrix light emitting elements. The control element is a constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor, and the constant current control element for each of the matrix light emitting elements is a voltage applied A lighting device using an LED, characterized by performing constant current control dynamically by feedback regardless of whether the LED is a driving circuit of the lighting device using the LED, and an illumination using the LED using the LED It is a drive method of an apparatus.

  The present invention also includes a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements, and the LED matrix has a matrix structure change. The LED connection structure is dynamically changed corresponding to the waveform applied by the control circuit, and the LED that optimizes the voltage applied to each LED element according to the alternating waveform voltage that changes sequentially is used. A power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix, a synchronous waveform filter that generates a synchronization signal for the waveform of the input commercial power supply, and the synchronization An operation state comparison detector for determining an operation state based on a signal from the waveform filter and the connection structure of the LED matrix in an arbitrary and / or optimal state An LED element switch unit and a matrix structure change control circuit are provided, which is an illumination device using an LED, and a drive circuit for the illumination device using such an LED. It is the drive method of the used illuminating device.

  Further, according to the present invention, the synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power source to the LED matrix, acquires a filtering signal from the pulsating current, and determines an operation state. A lighting device using an LED, and a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED It is.

  According to the present invention, the power supply unit that supplies the pulsating current obtained by full-wave rectification or both-wave rectification from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier, and the bridge rectifier is the LED matrix and the synchronous waveform filter. An illuminating device using an LED, characterized by outputting a full-wave rectified or both-wave rectified pulsating current from a commercial power source, and a driving circuit for the illuminating device using such an LED. It is the drive method of the illuminating device using existing LED.

  In the present invention, the power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier, and the bridge rectifier is connected to the LED matrix from the commercial power supply. A first bridge rectifier that outputs a pulsating current rectified by wave rectification or both waves, and a second bridge rectifier that outputs a pulsating current rectified by full wave or both waves from a commercial power supply to the synchronous waveform filter. This is a lighting device using an LED, a driving circuit for the lighting device using the LED, and a driving method for the lighting device using the LED using the LED.

  The present invention also includes a state control current look-up table controlled by a constant current control circuit, and a batch control constant current control circuit based on a voltage comparison that sequentially changes with the look-up table that holds the normalized voltage-current relationship It is the illuminating device using LED characterized by performing stepwise constant electric current control by, It is a drive circuit of the illuminating device using such LED, The driving method of the illuminating device using LED using this It is.

  Further, according to the present invention, an LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements, and the matrix light emitting element is an element switch for sequentially changing an arbitrary structure. The connection structure of the LED matrix is changed to an optimum state by changing the connection state of each element switch unit corresponding to the control signal from the matrix structure change control circuit. It is an illuminating device using LED, it is a drive circuit of the illuminating device using such LED, and is a driving method of the illuminating device using LED using this.

  According to the present invention, the element switch unit includes three or more switches, and the connection structure of the LED matrix is changed by changing the connection state of these switches. An illumination device using an LED, which is a switching circuit including a field effect transistor FET and a bipolar transistor, and a drive circuit for the illumination device using the LED, and an illumination using the LED using the LED It is a drive method of an apparatus.

  The present invention is not an advanced type of a light bulb lighting device, but is a lighting power control system based on a new idea that applies digital technology, and does not use a switching regulator. It contributes to cost reduction because it is unnecessary, and since it can emit light from all LED elements from a low voltage, it has good flicker performance, and there is no lifetime component, so an illuminating device using an LED with very high reliability, It is the drive circuit of the illuminating device using LED, and the drive method of the illuminating device using LED.

  The lighting device using the LED according to the present invention, the driving circuit of the lighting device using the LED, and the lighting device using the LED can be added with a dimming function, such as a street light, a crime prevention light, a hospital, a medical device, It can be suitably applied to amusement facilities, radio facilities, airplanes, etc., and as a product, it is preferably used for fluorescent lamp type straight tubes, base lights, downlights, floodlights, replaceable LED bulbs and the like. Further, since the circuit configuration is easy to make LSI, further cost reduction can be achieved in the future.

FIG. 1 is a diagram for explaining the present invention, and describes a case where 128 LEDs are driven as a practical example in consideration of easy understanding and current LED element performance. . Here, in the present embodiment, the number of units constituting the LED matrix has been described as 128. However, the present invention is not limited to such a configuration, and is configured by the number of elements that form a matrix of an arbitrary size. be able to. However, it is advantageous that the configuration is a power of two. Apart from the description of the present embodiment, for example, a configuration including 64, 32, or 256 units can be suitably applied.

  In the present invention, the LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements, and the LED matrix is dynamically changed in accordance with the input AC waveform by the matrix structure change control circuit. It has a configuration that changes the LED connection structure, optimizes the applied voltage and the required voltage of the device that change sequentially, and optimizes the operation efficiency of the current control circuit, thereby minimizing losses in the control circuit and the device.

In the example shown in FIG. 1, since the number of bits is 128, given in binary exponentiation, binary digit number required will be 7 bits. In this embodiment, a method of optimizing the voltage applied to the LED for each alternating waveform voltage that changes sequentially by changing the connection structure of the LED by sequentially switching the 7-bit LED for each number of digits. It shows.

  FIG. 2 is an explanatory diagram for understanding the switch matrix operation in this embodiment. In the voltage range exceeding the maximum operating voltage, as shown in the uppermost stage in the figure, all the LED light emitting elements are switched so as to be in series. When the voltage is ½ of the maximum operating voltage, the voltage is switched so as to be ½ series. Thereafter, the matrix is switched according to the number of bits, and finally, switching is performed in parallel in the case of 1/128 of the maximum operating voltage.

Logically, 128 LEDs can be sequentially changed to a power of 2 and the required voltage can be applied at the same time. However, since the actual operating voltage of the LED element needs to be at least 3V, The required voltage in the form of a matrix switch does not necessarily match the periodic voltage waveform of AC 100V. Therefore, optimization of matrix structure control bits is performed by performing normalization. FIG. 3 shows an example of normalization in the present embodiment, and highly efficient driving is realized by such normalization.

FIG. 4 is a conceptual diagram showing the AC voltage and state (states 2 to 6) after practical normalization, the switch timing of the LED array matrix, and the waveform synchronization pattern. Such normalization is necessary to determine the matrix structure switching method and the number of wirings on the substrate for practical use. As an operating mechanism, the LED matrix is dynamically deformed according to the operating state corresponding to the changing voltage of the AC power supply, and at the same time, the LED current required for the operating state according to the applied voltage of the LED element that changes sequentially. Also controls the value.

  FIG. 5 is a diagram for explaining an array shape change pattern of the LED array matrix. All LEDs can be lit at any operating voltage by switching the LED array matrix in series or parallel. The lighting device using the LED according to the present invention, the driving circuit of the lighting device using the LED, and the driving method of the lighting device using the LED are arranged in parallel with the alternating current waveform in which 128 LED array shapes are input, By changing the series structure, the applied voltage and the required voltage of the element are optimized, and the operating efficiency of the current control circuit is optimized, so that the loss (waste heat) in the control circuit and element can be minimized. .

  The lighting device using the LED according to the present invention, the driving circuit of the lighting device using the LED, and the driving method of the lighting device using the LED are all turned on when the minimum starting voltage VF of the LED is exceeded. Is possible. FIG. 6 is a diagram for explaining that all the LEDs can be turned on when all LEDs exceed the minimum activation voltage VF of the LEDs. Since the portion where the AC voltage is low is paralleled, it can be lit from a low voltage. Further, since all the LEDs are always lit, there is an advantage that no flicker occurs unlike a general capacitorless system.

  FIG. 7 is a conceptual diagram showing a functional block diagram of a drive circuit of a lighting device using LEDs according to the present invention. In the present invention, the LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements, and the LED matrix is dynamically changed in accordance with the input AC waveform by the matrix structure change control circuit. It has a configuration in which the LED connection structure is changed, and the applied voltage and the required voltage of the element that change sequentially are optimized, and the operation efficiency of the current control circuit is optimized. The present invention includes a constant current control circuit in which the current applied to each LED light emitting element is constant regardless of changes in the LED connection structure. The constant current control circuit may be arranged as a collective control constant current control circuit outside the LED matrix, or may be arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements. . Although all of these are shown in the figure, in practice, any one may be selected.

  As the collective control constant current control circuit, a constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor is preferably used. When the constant current control circuit is arranged as a constant current control element for each of the matrix-like light emitting elements inside the LED matrix, the constant current control element for each of the matrix-like light emitting elements is a constant current. A constant current circuit including an element (CRD), a field effect transistor (FET), and a bipolar transistor is preferably used, and the constant current control element for each matrix light emitting element is dynamically changed by feedback regardless of the applied voltage. It is desirable to perform constant current control.

  The present invention also includes a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements, and the LED matrix has a matrix structure change. The LED connection structure is dynamically changed corresponding to the waveform applied by the control circuit, and the LED that optimizes the voltage applied to each LED element according to the alternating waveform voltage that changes sequentially is used. A power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix, a synchronous waveform filter that generates a synchronization signal for the waveform of the input commercial power supply, and the synchronization An operation state comparison detector for determining an operation state based on a signal from the waveform filter and the connection structure of the LED matrix in an arbitrary and / or optimal state Characterized in that it comprises a LED element switch unit and matrix structure change control circuit to change.

Here, the synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix, and obtains a filtering signal from the pulsating current to determine an operation state. Output to the state comparison detector. A bridge rectifier is preferably used as the power supply unit that supplies the pulsating current rectified from the commercial power supply to the LED matrix and the synchronous waveform filter. The bridge rectifier is configured to output a full-wave rectified or double-wave rectified pulse current from a commercial power supply to both the LED matrix and the synchronous waveform filter, or a full-wave rectified or double-wave rectified pulse from the commercial power supply to the LED matrix. A first bridge rectifier that outputs a current and a second bridge rectifier that outputs a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the synchronous waveform filter may be selected. it can.

  FIG. 8 is an LED element switch block diagram showing the relationship between the LED element switch unit and the LED elements.

With such a configuration, the LED connection structure is dynamically changed according to the input AC waveform, and the applied voltage and the required voltage of the device that are sequentially changed are optimized, and the operation efficiency of the current control circuit is optimized. By doing so, it becomes possible to minimize the loss in the control circuit and the element. Each LED element can be suitably used without any problem, whether it is a single element or a collective element.

FIG. 9 is a conceptual diagram showing the operation of the matrix switch. FIG. 10 is a table showing the relationship between the switch states and the operation states in the matrix switch unit. Specifically, when switches 1 and 2 are on and switch 3 is off, the unit forms a parallel connection, and when switches 1 and 2 are off and switch 3 is on, the unit forms a series connection. . Control of these matrix switch units realizes matrix structure change control within the LED matrix.

  11 to 13 are conceptual diagrams for explaining an example of the operation of the matrix switch. By switching the matrix element switches, a fully parallel state in FIG. 11, a fully serial state in FIG. 12, and a 1/2 parallel state in FIG. 13 are obtained. In this way, all the connection forms of the matrix-like light emitting elements necessary in the LED matrix can be realized by controlling the matrix switch unit. The LED matrix is composed of LED light emitting elements having a power of 2 and the matrix structure change control in the LED matrix is a matrix light emitting element composed of LED light emitting elements having a power of 2 smaller than the total number. And can be dynamically changed in accordance with a waveform applied by a matrix structure change control circuit that determines an optimum structure for an element switch circuit that changes the connection form of the matrix light emitting elements.

  In addition, the present invention provides a matrix structure change control circuit or software algorithm that dynamically compares a normalized reference voltage with a sequentially changing power AC waveform voltage to thereby change the matrix control structure bit. The output value is determined to an optimum value. FIG. 14 is a conceptual diagram showing an example of a mounting form of a drive circuit of an illumination device using an LED according to the present invention. In the present invention, it is desirable to provide a constant current control circuit in which the current applied to each LED light emitting element is constant regardless of the change in the LED connection structure. The constant current control circuit may be arranged as a collective control constant current control circuit outside the LED matrix, or may be arranged inside the LED matrix as a constant current control element for each of the matrix light emitting elements. .

  The present invention also includes a plurality of LED light emitting elements and an LED drive circuit for driving the LED light emitting elements, and the LED light emitting elements form an LED matrix composed of the plurality of LED light emitting elements, and the LED matrix has a matrix structure change. The LED connection structure is dynamically changed corresponding to the waveform applied by the control circuit, and the LED that optimizes the voltage applied to each LED element according to the alternating waveform voltage that changes sequentially is used. A power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix, a synchronous waveform filter that generates a synchronization signal for the waveform of the input commercial power supply, and the synchronization An operation state comparison detector for determining an operation state based on a signal from the waveform filter and the connection structure of the LED matrix in an arbitrary and / or optimal state It is the illuminating device using LED provided with the LED element switch unit and matrix structure change control circuit to change to, and is a drive circuit of the illuminating device using such LED, and the driving of the illuminating device using the LED using this LED Is the method.

  Here, the synchronous waveform filter is connected to a power supply unit that supplies a pulsating flow that is full-wave rectified or both-wave rectified from a commercial power supply to the LED matrix, acquires a filtering signal from the pulsating flow, and determines an operating state. Output to the comparison detector. A bridge rectifier is preferably used as the power supply unit that supplies the pulsating current rectified from the commercial power supply to the LED matrix and the synchronous waveform filter. The bridge rectifier is configured to output a full-wave rectified or double-wave rectified pulse current from a commercial power supply to both the LED matrix and the synchronous waveform filter, or a full-wave rectified or double-wave rectified pulse from the commercial power supply to the LED matrix. A first bridge rectifier that outputs a current and a second bridge rectifier that outputs a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the synchronous waveform filter may be selected. it can.

  FIG. 14 shows a first bridge rectifier that outputs a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the LED matrix, and a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the synchronous waveform filter. However, the present invention is not limited to such a configuration, and the output after rectification is supplied to both the power supply unit to the matrix array and the waveform analysis filter. Any configuration can be used.

  The present invention also includes a state control current look-up table controlled by a constant current control circuit, and a batch control constant current control circuit based on a voltage comparison that sequentially changes with the look-up table that holds the normalized voltage-current relationship It is the illuminating device using LED characterized by performing stepwise constant electric current control by, It is a drive circuit of the illuminating device using such LED, The driving method of the illuminating device using LED using this It is.

  Further, according to the present invention, an LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements, and the matrix light emitting element is an element switch for sequentially changing an arbitrary structure. The connection structure of the LED matrix is changed to an optimum state by changing the connection state of each element switch unit corresponding to the control signal from the matrix structure change control circuit. It is an illuminating device using LED, it is a drive circuit of the illuminating device using such LED, and is a driving method of the illuminating device using LED using this.

  According to the present invention, the element switch unit includes three or more switches, and the connection structure of the LED matrix is changed by changing the connection state of these switches. An illumination device using an LED, which is a switching circuit including a field effect transistor FET and a bipolar transistor, and a drive circuit for the illumination device using the LED, and an illumination using the LED using the LED It is a drive method of an apparatus.

  FIG. 15 is a conceptual diagram showing a series-parallel switching circuit of an element switch unit and a wiring on a single-layer board according to the present invention. By using the wiring having such a configuration, it is a lighting device using the LED according to the present invention more easily, and is a driving circuit of the lighting device using the LED, and the lighting device using the LED using the LED A driving method is realized.

  Here, in the series of explanations, the number of units constituting the LED matrix has been explained as 128. However, the present invention is not limited to such a configuration, and the number of elements that form a matrix of an arbitrary size is used. be able to. However, as described above, it is advantageous to make the configuration a power of two. Apart from the description of the present embodiment, for example, a configuration including 64, 32, or 256 units can be suitably applied.

  As described above, by using the configuration according to the present invention, the lighting device using the LED according to the present invention, the driving circuit of the lighting device using the LED, and the driving method of the lighting device using the LED are simple. Stable light emission that solves the problem of flicker and dark time can be obtained with a simple structure, eliminating the need for a smoothing capacitor after rectification and a large-capacity electrolytic capacitor, making it possible to manufacture at low cost, improving long-term reliability, and high frequency There is no noise problem, and the operating efficiency of the current control circuit is optimized, so that the control circuit, the lighting device using the LED that minimizes the loss in the element, the driving circuit of the lighting device using the LED, and the LED A driving method of the used illumination device can be provided.

    The illumination device using the LED according to the present invention, the drive circuit of the illumination device using the LED, and the drive method of the illumination device using the LED according to the present invention are stable in solving flicker and dark time problems with a simple configuration. Light emission, no rectified smoothing capacitor and large-capacitance electrolytic capacitor are required, can be manufactured at low cost, and long-term reliability is improved, there is no high-frequency noise problem, and the operation efficiency of the current control circuit is optimal As a result, a control circuit, an illumination device using an LED that achieves minimization of loss in the element, an illumination device drive circuit using the LED, and an illumination device drive method using the LED are realized. Therefore, it can be said that the industrial utility value is great.

Claims (51)

An illumination device using LEDs,
A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration in which the LED connection structure is dynamically changed in response to an input AC waveform by a matrix structure change control circuit.
It is characterized by minimizing losses in the control circuit and the element by optimizing the applied voltage and the required voltage of the element that are sequentially changed, and optimizing the operation efficiency of the current control circuit.
Lighting device using LED. The LED matrix is composed of LED light emitting elements of the power of 2;
The matrix structure change control in the LED matrix is divided into matrix-like light emitting elements composed of LED light emitting elements of a power of 2 smaller than the total number,
It is characterized in that it is dynamically changed corresponding to a waveform applied by a matrix structure change control circuit for determining an optimum structure to an element switch circuit for changing the connection form of the matrix light emitting elements.
An illumination device using the LED according to claim 1. The matrix structure change control circuit or software algorithm optimizes the output value of the matrix control structure bits by dynamically comparing with the normalized reference voltage in response to the sequentially changing power AC waveform voltage. Characterized in that the value is fixed,
The illuminating device using LED in any one of Claim 1 or 2. The illumination device using the LED is
It is characterized by comprising a constant current control circuit so that the current applied to each LED light emitting element is constant regardless of the change of the LED connection structure,
The illuminating device using LED as described in any one of Claims 1 thru | or 3. The constant current control circuit is:
It is arranged outside the LED matrix as a collective control constant current control circuit,
The illuminating device using LED of Claim 4. The collective control constant current control circuit is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
An illumination device using the LED according to claim 5. The constant current control circuit is:
It is arranged inside the LED matrix as a constant current control element for each matrix-like light emitting element,
The illuminating device using LED of Claim 4. The constant current control element for each matrix light emitting element is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
The illuminating device using LED of Claim 7. The constant current control element for each matrix light emitting element is:
The constant current control is performed dynamically by feedback regardless of the applied voltage,
The illuminating device using LED of Claim 7 or 8. A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration that dynamically changes the LED connection structure in response to the waveform applied by the matrix structure change control circuit.
An illumination device using LEDs that optimizes the voltage applied to each LED element in accordance with an alternating waveform voltage that changes sequentially,
A power supply unit that supplies a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the LED matrix;
A synchronization waveform filter that generates a synchronization signal for the waveform of the input commercial power supply,
An operation state comparison detector for determining an operation state according to a signal from the synchronous waveform filter;
An LED element switch unit for changing the connection structure of the LED matrix to an arbitrary and / or optimal state and a matrix structure change control circuit,
The illuminating device using LED as described in any one of Claims 1 thru | or 9.   The synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix,
A filtering signal from the pulsating flow is acquired and output to an operation state comparison detector that determines an operation state.
The illuminating device using LED of Claim 10.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to both the LED matrix and the synchronous waveform filter.
The illuminating device using LED of Claim 10 or 11.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or double-wave rectified pulsating current from a commercial power supply to the LED matrix and a full-wave rectified or double-wave rectified pulsating current from the commercial power supply to the synchronous waveform filter. Comprising a second bridge rectifier
The illuminating device using LED of Claim 10 or 11. The illumination device using the LED is
Including a state control current look-up table controlled by a constant current control circuit;
A step-by-step constant current control by a batch control constant current control circuit is performed by a voltage comparison that sequentially changes with a lookup table that holds the normalized voltage-current relationship.
An illumination device using the LED according to claim 5. The LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements,
The matrix light emitting elements are connected by an element switch unit for sequentially changing an arbitrary structure,
Each element switch unit changes its connection state in response to a control signal from the matrix structure change control circuit, thereby changing the connection structure of the LED matrix to an optimum state.
The illuminating device using LED as described in any one of Claims 1 thru | or 14. The element switch unit is
Comprising three or more switches,
The connection structure of the LED matrix is changed by changing the connection state of these switches,
An illumination device using the LED according to claim 15. The element switch unit is
Comprising three or more switches,
The switch is a switching circuit including a field effect transistor FET and a bipolar transistor, respectively.
An illumination device using the LED according to claim 16. A driving circuit for an illumination device using an LED,
A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration in which the LED connection structure is dynamically changed in response to an input AC waveform by a matrix structure change control circuit.
It is characterized by minimizing losses in the control circuit and the element by optimizing the applied voltage and the required voltage of the element that are sequentially changed, and optimizing the operation efficiency of the current control circuit.
A driving circuit of a lighting device using LEDs. The LED matrix is composed of LED light emitting elements of the power of 2;
The matrix structure change control in the LED matrix is divided into matrix-like light emitting elements composed of LED light emitting elements of a power of 2 smaller than the total number,
It is characterized in that it is dynamically changed corresponding to a waveform applied by a matrix structure change control circuit for determining an optimum structure to an element switch circuit for changing the connection form of the matrix light emitting elements.
The drive circuit of the illuminating device using LED of Claim 18. The matrix structure change control circuit or software algorithm optimizes the output value of the matrix control structure bits by dynamically comparing with the normalized reference voltage in response to the sequentially changing power AC waveform voltage. Characterized in that the value is fixed,
The drive circuit of the illuminating device using LED in any one of Claim 18 or 19. The drive circuit of the illumination device using the LED is
It is characterized by comprising a constant current control circuit so that the current applied to each LED light emitting element is constant regardless of the change of the LED connection structure,
A drive circuit for an illumination device using the LED according to any one of claims 18 to 20. The constant current control circuit is:
It is arranged outside the LED matrix as a collective control constant current control circuit,
The drive circuit of the illuminating device using LED of Claim 21. The collective control constant current control circuit is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
The drive circuit of the illuminating device using LED of Claim 22. The constant current control circuit is:
It is arranged inside the LED matrix as a constant current control element for each matrix-like light emitting element,
The drive circuit of the illuminating device using LED of Claim 21. The constant current control element for each matrix light emitting element is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
The drive circuit of the illuminating device using LED of Claim 24. The constant current control element for each matrix light emitting element is:
The constant current control is performed dynamically by feedback regardless of the applied voltage,
A driving circuit for an illumination device using the LED according to claim 24 or 25. A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration that dynamically changes the LED connection structure in response to the waveform applied by the matrix structure change control circuit.
An illumination device using LEDs that optimizes the voltage applied to each LED element in accordance with an alternating waveform voltage that changes sequentially,
A power supply unit that supplies a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the LED matrix;
A synchronization waveform filter that generates a synchronization signal for the waveform of the input commercial power supply,
An operation state comparison detector for determining an operation state according to a signal from the synchronous waveform filter;
An LED element switch unit for changing the connection structure of the LED matrix to an arbitrary and / or optimal state and a matrix structure change control circuit,
27. A driving circuit for an illuminating device using the LED according to any one of claims 18 to 26.   The synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix,
A filtering signal from the pulsating flow is acquired and output to an operation state comparison detector that determines an operation state.
28. A driving circuit of an illumination device using the LED according to claim 27.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to both the LED matrix and the synchronous waveform filter.
29. A driving circuit of an illumination device using the LED according to claim 27 or 28.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or double-wave rectified pulsating current from a commercial power supply to the LED matrix and a full-wave rectified or double-wave rectified pulsating current from the commercial power supply to the synchronous waveform filter. Comprising a second bridge rectifier
29. A driving circuit of an illumination device using the LED according to claim 27 or 28. The drive circuit of the illumination device using the LED is
Including a state control current look-up table controlled by a constant current control circuit;
A step-by-step constant current control by a batch control constant current control circuit is performed by a voltage comparison that sequentially changes with a lookup table that holds the normalized voltage-current relationship.
It is characterized by
24. A driving circuit of an illumination device using the LED according to claim 22 or 23. The LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements,
The matrix light emitting elements are connected by an element switch unit for sequentially changing an arbitrary structure,
Each element switch unit changes its connection state in response to a control signal from the matrix structure change control circuit, thereby changing the connection structure of the LED matrix to an optimum state.
32. A driving circuit for an illuminating device using the LED according to any one of claims 18 to 31. The element switch unit is
Comprising three or more switches,
The connection structure of the LED matrix is changed by changing the connection state of these switches,
The drive circuit of the illuminating device using LED of Claim 32. The element switch unit is
Comprising three or more switches,
The switch is a switching circuit including a field effect transistor FET and a bipolar transistor, respectively.
34. A driving circuit of an illumination device using the LED according to claim 33. A method of driving an illumination device using an LED,
A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration in which the LED connection structure is dynamically changed in response to an input AC waveform by a matrix structure change control circuit.
It is characterized by minimizing losses in the control circuit and the element by optimizing the applied voltage and the required voltage of the element that are sequentially changed, and optimizing the operation efficiency of the current control circuit.
A driving method of a lighting device using an LED. The LED matrix is composed of LED light emitting elements of the power of 2;
The matrix structure change control in the LED matrix is divided into matrix-like light emitting elements composed of LED light emitting elements of a power of 2 smaller than the total number,
It is characterized in that it is dynamically changed corresponding to a waveform applied by a matrix structure change control circuit for determining an optimum structure to an element switch circuit for changing the connection form of the matrix light emitting elements.
36. A driving method of an illumination device using the LED according to claim 35. The matrix structure change control circuit or software algorithm optimizes the output value of the matrix control structure bits by dynamically comparing with the normalized reference voltage in response to the sequentially changing power AC waveform voltage. Characterized in that the value is fixed,
37. A driving method of a lighting device using the LED according to claim 35. The driving method of the lighting device using the LED is as follows:
It is characterized by comprising a constant current control circuit so that the current applied to each LED light emitting element is constant regardless of the change of the LED connection structure,
38. A driving method of a lighting device using the LED according to any one of claims 35 to 37. The constant current control circuit is:
It is arranged outside the LED matrix as a collective control constant current control circuit,
A driving method of an illumination device using the LED according to claim 38. The collective control constant current control circuit is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
40. A driving method of an illumination device using the LED according to claim 39. The constant current control circuit is:
It is arranged inside the LED matrix as a constant current control element for each matrix-like light emitting element,
A driving method of an illumination device using the LED according to claim 38. The constant current control element for each matrix light emitting element is:
A constant current circuit including a constant current element (CRD), a field effect transistor (FET), and a bipolar transistor,
The drive method of the illuminating device using LED of Claim 41. The constant current control element for each matrix light emitting element is:
The constant current control is performed dynamically by feedback regardless of the applied voltage,
A driving method of an illumination device using the LED according to claim 31 or 32. A plurality of LED light emitting elements and an LED driving circuit for driving the LED light emitting elements are provided.
The LED light-emitting element forms an LED matrix composed of a plurality of LED light-emitting elements,
The LED matrix has a configuration that dynamically changes the LED connection structure in response to the waveform applied by the matrix structure change control circuit.
An illumination device using LEDs that optimizes the voltage applied to each LED element in accordance with an alternating waveform voltage that changes sequentially,
A power supply unit that supplies a pulsating current that is full-wave rectified or both-wave rectified from a commercial power supply to the LED matrix;
A synchronization waveform filter that generates a synchronization signal for the waveform of the input commercial power supply,
An operation state comparison detector for determining an operation state according to a signal from the synchronous waveform filter;
An LED element switch unit for changing the connection structure of the LED matrix to an arbitrary and / or optimal state and a matrix structure change control circuit,
44. A driving method of an illuminating device using the LED according to any one of claims 35 to 43.   The synchronous waveform filter is connected to a power supply unit that supplies a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to the LED matrix,
A filtering signal from the pulsating flow is acquired and output to an operation state comparison detector that determines an operation state.
The drive method of the illuminating device using LED of Claim 44.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or both-wave rectified pulsating current from a commercial power supply to both the LED matrix and the synchronous waveform filter.
The driving method of the illuminating device using LED of Claim 44 or 45.   The power supply unit that supplies the pulsating current that has been full-wave rectified or both-wave rectified from the commercial power supply to the LED matrix and the synchronous waveform filter is a bridge rectifier,
The bridge rectifier outputs a full-wave rectified or double-wave rectified pulsating current from a commercial power supply to the LED matrix and a full-wave rectified or double-wave rectified pulsating current from the commercial power supply to the synchronous waveform filter. Comprising a second bridge rectifier
The driving method of the illuminating device using LED of Claim 44 or 45. The drive circuit of the illumination device using the LED is
Including a state control current look-up table controlled by a constant current control circuit;
A step-by-step constant current control by a batch control constant current control circuit is performed by a voltage comparison that sequentially changes with a lookup table that holds the normalized voltage-current relationship.
It is characterized by
The drive method of the illuminating device using LED of Claim 39 or 40. The LED matrix composed of the plurality of LED light emitting elements is divided into matrix light emitting elements composed of LED light emitting elements,
The matrix light emitting elements are connected by an element switch unit for sequentially changing an arbitrary structure,
Each element switch unit changes its connection state in response to a control signal from the matrix structure change control circuit, thereby changing the connection structure of the LED matrix to an optimum state.
49. A driving method of an illumination device using the LED according to any one of claims 35 to 48. The element switch unit is
Comprising three or more switches,
The connection structure of the LED matrix is changed by changing the connection state of these switches,
The drive method of the illuminating device using LED of Claim 49. The element switch unit is
Comprising three or more switches,
The switch is a switching circuit including a field effect transistor FET and a bipolar transistor, respectively.
The drive method of the illuminating device using LED of Claim 50.